Russians on the International Space Station will launch a mini-satellite to honor this year's 50th anniversary of Yuri Gagarin's flight, mission control said.

The mini-satellite Kedr, named after Gagarin's call sign, will transmit greeting messages in 15 languages and relay images of Earth and telemetry data to amateur radio operators as it orbits, RIA Novosti reported Friday.

The satellite, to be launched Aug. 3, is part of the Amateur Radio on the International Space Station project.

Kedr will by launched by Cosmonauts Alexander Samokutyaev and Sergei Volkov during a scheduled 6-hour spacewalk.

Gagarin was the first human to journey into space in a Vostok spacecraft launched on April 12, 1961.